Boiler.



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-BOILER.

A PPLIUATION FILED JAN. 2. 190s.

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UNITED STATES u Patented October 20, 1903.

- OSCAR CARNEs AND MTCHAEL FARLEY, OE PRESTON, IOWA.

BOILER.`

SPECIFICATION forming part of Letters Patent N o. 741,885, dated October20, 1903. Application inea January 2,1903. serial No. 137.425. (No maisTo ctZZ whom it may concern,.-

Be it known that we, OsCAR CARNES and MICHAEL FARLEY, citizens of theUnited States, and residents of Preston, county of Jackson, and State ofIowa, have invented certain new and useful Improvements in AgriculturalBoilers, of which the following is a specification, reference being hadto the accompanying drawings, forming a part thereof, in which similarletters of reference indi-V cate corresponding parts in all the figures.

rInhe subject of the present invention is an agricultural boiler havingfor its more prominent objects adequate water-jacketing provision andextended heat-circulating surface.

With the above and other purposes in view the invention contemplates aboiler of the horizontal return-flue type adapted for portabilityandcapable of being loaded on a truck Or other platform conveyanceAWithout liability of charring.

With the above and other purposes in view the invention consists inV aboiler structure having an extended horizontal tubular body, a iireboxlocated at and immediately below the front portion thereof, andarrangement of water-jacketing that conduces to the rapid generation ofsteam, the liberation of heated air, and circulation of the water.

The details and special features involved in the novel boiler areexploited at length in the subsequent extended description.

In the accompanying drawings, forming part of this specification, Figurel is a longitudinal sectional View of an agricultural boiler embodyingour invention. Fig. 2 is a vertical transverse section of the boilerstructure disclosed in Fig. l. Fig. 3 is a transverse section on theline 3 3.

In the improved construction of improved steam-boiler we have adapted ahorizontaltube return-Hue type. The fire-box A is of the verticalrectangular arrangement and is located beneath the forward end of thehorizontal boiler-body B. Said fire-box besides containing a suitablecomplement of grate-bars A has the bottom and rear waterspaces A2 A3,besides the vertical water-legs A4, which communicate with said bottomspace A2, as indicated in Fig. 2, and consequently are in communicationwith the rear water-space A3. It will be observed that the bottom sheetB of the boiler-bod y is arranged in such relation to the fire-box that,in connection With a supplemental sheet B2, dis` posed as illustrated,an extended horizontal flue B3 is provided for the Circulation of theproducts of combustion from the upper rear portion of the fire-box tothe space B4 at the rear of the tube-header B5.

An external supplemental body-sheet B6 beneath and concentric with thesheet B2 provides an extended rearward horizontal water-space B7,communicating with the rear space A8 of the lire-box.

With a view of baiiiing the circulation 'of the products of combustionas they flow rear- Wardly from the upper portion of the fire-box andwith a view of developing the maximum heat efficiency therefrom we havelocated in the fine Bs a metal bridge C, embodying the extended base cand vertical web c', the latter being of such height as to provide, inconnection with the bottom of the sheet B3, a restricted heat-passagec2.

The group or battery of horizontal tubular fines D extend from theheader B5 forwardly, where they discharge through the forward header B8,the latter forming, in connection with the breeching B9, a soot-box B10,from which 'the soot may be readily removed when desired through anopening normally closed by a depending hinged door B11.

The products of combustion, while afforded ample opportunity for Vfreedevelopment in the rear space B, are nevertheless positively directedinto the tubular lues D by means of an upper baffling-plate d.

It will be appreciated from the several gures of the drawings that theimproved boiler construction, while being efficiently waterjacketed bothwith reference to its iire-box and extended body, also provides an amplewater-chamber D, in the lower part of which is disposed a group orbattery of flues. Moreover, the arrangement ofside water-legs A4 andtheir communicating openings a a', lo-

.cated with respect to the water-chamber, provides for ahighly-satisfactory circulation of the water at the point where it isliable to become the hottest-in the vicinity of the iirebox.V The largebody of water which will normally be contained Within the horizontalchamber D' serves to neutralize the highly- .ing or charring.

heated condition of the Water ascending in the one leg A4, so thatdescending in the other will be assured such a moderately-reducedtemperature as will preclude external heat- Again, the extendedWaterspace B7 beneath the extended flue B3 will also operate to preventthe external manifestation of undue heating or charring.

E is the stack leading from the upper end of the soot-box, while F isthe dome intermediately on the h`orizontal body and communicating withthe Water-space D therein.

From the foregoing it will be readily comprehended thataboiler structuresuch as that described is of hi ghly-portable character, thus adaptingit for mounting on a truck or other suitable vehicle, whereby it may betransported from one point to another to serve for agriculturalpurposes.

Having now described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

In an agricultural boi1er,the combination of the horizontal bodycontaining rear and front i heat-spaces, and return-fines connecting thesame, of a lower forward fire-box communicating with the rear heat-spaceby means of the lower extended horizontal flue, waterjacketing both forsaid fire-box andfor the horizontal body below the extendedlue thereof,the jacketing of the box including lower space A2, and vertical legs A4,the latter commuuicating at their tops with the waterchamber containingthe return-lines, and a baffling-bridge C, located in the lower extendedhorizontal lue, and the baffle d,located in the rear heat-space, abovethe openings of the said return-dues.

In testimony that we claim the foregoing as our invention we have signedour names, in the presence of two witnesses, this 12th day of December,1902.

OSCAR CARNES.' MICHAEL FARLEY.

Witnesses:

G. D. FOSTER, WILLIAM HAssoN.

